from bremen airport:

You can as well use the tram No. 6 direction "Universität", which also has its stop directly in front of the airport terminal. It goes directly to the university. A ride is 2,70 euro and you can buy the ticket in the tram using a vending machine. It takes coins, and also notes of 5 and 10 euro, providing change.

You need to get off at the stop "Universität-Süd". Our building then is just across the street. It is marked "NW1" with big letters on top.